S3C825A/P825A MICROCONTROLLER
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Table of Contents
Part I — Programming Model
Chapter 1
Product Overview
S3C8-Series Microcontrollers...................................................................................................................1-1
S3C825A Microcontroller .........................................................................................................................1-1
OTP.........................................................................................................................................................1-1
Features ..................................................................................................................................................1-2
Block Diagram .........................................................................................................................................1-3
Pin Assignment........................................................................................................................................1-4
Pin Descriptions.......................................................................................................................................1-6
Pin Circuits ..............................................................................................................................................1-8
Chapter 2
Address Spaces
Overview .................................................................................................................................................2-1
Program Memory (ROM) .........................................................................................................................2-2
Register Architecture ...............................................................................................................................2-3
Register Page Pointer (PP)..................................................................................................................2-5
Register Set 1......................................................................................................................................2-6
Register Set 2......................................................................................................................................2-6
Prime Register Space..........................................................................................................................2-7
Working Registers ...............................................................................................................................2-8
Using the Register Points ....................................................................................................................2-9
Register Addressing.................................................................................................................................2-11
Common Working Register Area (C0H–CFH) ......................................................................................2-13
4-Bit Working Register Addressing ......................................................................................................2-14
8-Bit Working Register Addressing ......................................................................................................2-16
System and User Stack ...........................................................................................................................2-18
Chapter 3
Addressing Modes
Overview .................................................................................................................................................3-1
Register Addressing Mode (R) .................................................................................................................3-2
Indirect Register Addressing Mode (IR)....................................................................................................3-3
Indexed Addressing Mode (X) ..................................................................................................................3-7
Direct Address Mode (DA) .......................................................................................................................3-10
Indirect Address Mode (IA) ......................................................................................................................3-12
Relative Address Mode (RA)....................................................................................................................3-13
Immediate Mode (IM) ..............................................................................................................................3-14